⺀

{| style="border: 2px solid #4B4B55; width: min(100%, 380px);" darkstyle="border-color: #48484a;"
|-
| colspan="4" style="text-align: center; font-size: 5em; padding: 26px 0; line-height: 1; color: #4B4B55;" darkstyle="color: var(--wiki-color);" | ⺀
|-
! style="color: #4B4B55; text-align: left; width: 34%; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Unicode name
| colspan="3" style="padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | CJK Radical Repeat
|-
! style="color: #4B4B55; text-align: left; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Code point
| style="padding: 6px 10px; width: 16%; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | U+2E80
! style="color: #4B4B55; text-align: left; width: 34%; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Radical
| style="padding: 6px 10px; width: 16%; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | 3
|-
! style="color: #4B4B55; text-align: left; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Block
| colspan="3" style="padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | CJK Radicals Supplement (U+2E80–U+2EFF)
|-
! style="color: #4B4B55; text-align: left; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Character
| colspan="3" style="padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | None — no unified ideograph
|-
! style="color: #4B4B55; text-align: left; padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="color: var(--wiki-color); border-color: #2c2c2e;" | Decomposition
| colspan="3" style="padding: 6px 10px; border-bottom: 1px solid #eee;" darkstyle="border-color: #2c2c2e;" | None
|-
! style="color: #4B4B55; text-align: left; padding: 6px 10px;" darkstyle="color: var(--wiki-color);" | Normalizes under
| colspan="3" style="padding: 6px 10px;" | None — see below
|}

{{ The Unicode Kangxi Radicals block Navbox }}

'''⺀''' is a Unicode character at '''U+2E80''', named CJK Radical Repeat. It is not a Chinese character in ordinary use, and it is the first character of the CJK Radicals Supplement block.

Every other character in that block depicts a shape that also exists among the unified ideographs, so each of them has an ordinary character a reader can use instead. ⺀ does not. Unicode records no cross-reference for it, which makes it the one character in either radical block with nothing to point to.

= What this code point is for =

The CJK Radicals Supplement block holds the radical shapes that the [[Kangxi radicals|Kangxi Radicals]] block leaves out: variant forms, simplified forms, and the shapes a radical takes in one position rather than another. Unicode annotates ⺀ as a variant of Kangxi radical 3, the dot, encoded in the other block as [[⼂]].

Its purpose is the same as that of the Kangxi Radicals block. A table of radicals is a list of abstract indexing elements rather than a passage of text, and giving those elements their own code points lets a font apply chart-specific shapes and spacing without disturbing how the same glyph is drawn in running prose. The block also serves round-trip compatibility with older East Asian character sets that had made the same separation.

Neither purpose involves writing words. Because ⺀ has no counterpart among the unified ideographs, there is no ordinary character it can stand in for, and no context in running text where it belongs.

= Normalization behavior =

⺀ carries no decomposition of any kind. No normalization form — NFC, NFD, NFKC or NFKD — will change it, and none ever will, because normalization is stability-guaranteed and decompositions are not added to existing characters.

For the other 113 undecomposable characters in this block, that permanence is a practical trap. Someone copies a radical glyph out of a chart, and the ordinary character it resembles never matches it again, in any system, indefinitely. ⺀ works differently. There is no ordinary character it could have folded into, so a string containing it will never match anything else, and nothing was lost in the copying.

= See also =

* [[⼂]]
* [[Kangxi radicals]]
* [[Unicode normalization]]

= Further reading =

* [https://www.unicode.org/versions/Unicode16.0.0/core-spec/chapter-18/ The Unicode Standard, Chapter 18: East Asia] — defines the Kangxi Radicals and CJK Radicals Supplement blocks and their intended use
* [https://www.unicode.org/reports/tr38/ Unicode Standard Annex #38] — the Unihan database, including the radical-stroke indexing this block supports